Apple Watch Ultra 4

– 49-mm titanium case
– Always-On Retina display
– Up to 3,000 nits
– Wide-angle OLED
– LTPO3
– Recovery HRV
– High-frequency background heart rate tracking
– ECG app
– High- and low-heart-rate notifications
– Irregular rhythm notifications
– Low cardio fitness notifications
– Blood Oxygen app
– Sleep tracking
– Sleep apnoea notifications
^– Sleep score
– Vitals app featuring heart rate, respiratory rate, wrist temperature, blood oxygen, sleep duration and HRV
– Wrist temperature sensing
– Cycle tracking
– Improved period predictions
– Fertile window estimates
– Retrospective ovulation estimates
– Perimenopause and menopause support
– Apple Intelligence
– Audio Intelligence
– Siri AI
– Emergency SOS
– Emergency SOS via satellite
– International emergency calling
– Fall Detection and Crash Detection
– Siren
– Water-resistant to 100 metres
– Swim, snorkel, scuba, high-speed water sports
– Depth gauge to 40 m
– Water temperature sensor
– Precision dual‑frequency GPS
– Cellular and satellite options
– 5G capable
– S11 chip
– Wrist flick gesture
– Single and double tap gestures
– Siri AI
– Precision Finding for iPhone
– Up to 50 hours
– Up to 84 hours in Low Power Mode
– Fast-charge–capable (0–80% in about 45 minutes; 15 minutes for up to 18 hours)